I have used Sherwood jobber drills for some time, without any real problems.
Cromwell supply Industry, so cannot afford to have major customers unhappy with their products.
If they relied on Model Engineers for their income, they would have ceased trading LONG ago.
(I am sure that Kennedy and Sherwood are the names for products exclusive to Cromwell, sourced, in all probability, from where they can get the best price/quality match)
I use drills with 0.1mm increments for as final tapping, having roughed out to the nearest 0.5mm with a coarser set.
Some Cromwell products seem pricey, but you almost always get what you pay for. Overall, I am not unhappy with what I have bought from them.
Howard